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Borrowings (Details) (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Debt Instrument [Line Items] |  |
Pledged financial instruments for Federal Home Loan Bank | $ 179,000,000 | $ 142,000,000
Short-term Debt [Line Items] |  |
Amount | 11,609,000 | 13,756,000
Rate (in hundredths) | 0.10% | 0.23%
Line of Credit [Member] |  |
Short-term Debt [Line Items] |  |
Amount | 0 | 2,661,000
Rate (in hundredths) | 0.00% | 0.75%
Repurchase Agreements [Member] |  |
Short-term Debt [Line Items] |  |
Amount | 11,609,000 | 11,095,000
Rate (in hundredths) | 0.10% | 0.10%
Fixed Rate Advances with Monthly Principal and Interest Payments [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 13,128,000 | 13,705,000
Federal Home Loan Bank Fixed Rate Advance Due January 2015 [Member] | Fixed Rate Advances Due at Maturity [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 5,000,000 | 5,000,000
Interest rate, period end (in hundredths) | 2.00% |
Federal Home Loan Bank Advance Due March 2017 [Member] | Fixed Rate Advances Due at Maturity [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 5,000,000 | 5,000,000
Interest rate, period end (in hundredths) | 5.25% |
Federal Home Loan Bank Advance Due March 2014 [Member] | Fixed Rate Advances with Monthly Principal and Interest Payments [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | 1,050,000 | 1,308,000
Interest rate, period end (in hundredths) | 2.45% |
Federal Home Loan Bank Advance Due March 2019 [Member] | Fixed Rate Advances with Monthly Principal and Interest Payments [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 2,078,000 | $ 2,397,000
Interest rate, period end (in hundredths) | 2.82% |

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for FHLB debt obligations, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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